package com.example.lenovo.listviewtest;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import java.util.List;

public class FruitAdapter extends ArrayAdapter<Fruit> {
    private  int resourceId;
    public FruitAdapter(Context context, int textViewResourceId, List<Fruit> objcets){
        super(context, textViewResourceId,objcets);
        resourceId = textViewResourceId;
    }


    @Override
    public View getView(int position,  View convertView, ViewGroup parent) {
        Fruit fruit = getItem(position);//获取当前的Fruit实例
        View view;
        ViewHolder viewHolder;
        if(convertView == null){
            view = LayoutInflater.from(getContext()).inflate(resourceId, parent, false);
            viewHolder = new ViewHolder();
            viewHolder.fruitImage = (ImageView) view.findViewById(R.id.fruit_image);
            viewHolder.fruitName = (TextView)view.findViewById(R.id.fruit_name);
            view.setTag(viewHolder);//将ViewHolder存储在View中
        }
        else{
            view = convertView;
            viewHolder = (ViewHolder) view.getTag();//重新获取ViewHolder
        }
        viewHolder.fruitImage.setImageResource(fruit.getImageId());
        viewHolder.fruitName.setText(fruit.getName());
//        View view = LayoutInflater.from(getContext()).inflate(resourceId, parent, false);
       /* ImageView fruitImage = (ImageView) view.findViewById(R.id.fruit_image);
        TextView fruitName = (TextView) view.findViewById(R.id.fruit_name);
        fruitImage.setImageResource(fruit.getImageId());
        fruitName.setText(fruit.getName());*/
        return view;
    }
    class ViewHolder{
        ImageView fruitImage;
        TextView fruitName;
    }
}
